text: The mineral was recorded in 1955 on three bronze artifacts from ancient Egypt, which were being held in the Fogg Art Museum at Harvard. Chalconatronite was found inside of two bronze figures (one depicting a seated Sekhmet, and another one depicting a group of cats and kittens) from around the late Nubian Dynasty or early Saite Period. Another chalconatronite specimen was found under a bronze censer from the late Coptic Period. The chalconatronite found on the censer formed over cuprite and some atacamite crystals, which are associated minerals.
  Chalconatronite was also found on iron and copper Roman armor in 1982 at a site in Chester, England. Some of the mineral was found on a copper pin in St. Mark's Basilica, Venice and in two different Mayan paintings. Along with pseudomalachite, chalconatronite was found on an illuminated manuscript from the sixteenth century. Synthetic chalconatronite could have possibly been made in ancient China as a form of pigment, named "synthetic malachite". It was made by taking copper oxide and boiling it with white alum in a "sufficient amount of water". After the result is cooled, a natron solution would be added to precipitate a synthetic form of chalconatronite, as sodium copper carbonate.